build(deps): bump libp2p from 6478faf to cbdbaa8

Bumps [libp2p](https://github.com/libp2p/rust-libp2p) from `6478faf` to `cbdbaa8`.
- [Release notes](https://github.com/libp2p/rust-libp2p/releases)
- [Commits](libp2p/rust-libp2p@6478faf...cbdbaa8)

---
updated-dependencies:
- dependency-name: libp2p
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>